Photoluminescence properties of Co2+-doped ZnO nanocrystals
(2006) Journal of Luminescence — Vol. 118, n° 2, p. 245-250 (2006)
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- Abstract
- We performed photoluminescence experiments on colloidal, Co2+-doped ZnO nanocrystals in order to study the electronic properties of Co2+ in a ZnO host. Room temperature measurements showed, next to the ZnO exciton and trap emission, an additional emission related to the Co2+ dopant. The spectral position and width of this emission does not depend on particle size or Co2+ concentration. At 8 K, a series of ZnO bulk phonon replicas appear on the Co2+-emission band. We conclude that Co2+ ions are strongly localized in the ZnO host, making the formation of a Co2+ d-band unlikely. Magnetic measurements revealed a paramagnetic behaviour. (c) 2005 Elsevier B.V. All rights reserved.
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Lommens, P., Smet, P., Donega, C., Meijerink, A., Piraux, L., Michotte, S., Mátéfi-Tempfli, S., Poelman, D., & Hens, Z. (2006). Photoluminescence properties of Co2+-doped ZnO nanocrystals. Journal of Luminescence, 118(2), 245-250. https://doi.org/10.1016/j.jlumin.2005.08.020 (Original work published 2006)